Fibonacci Function C++

Fibonacci

#include <iostream>
using namespace std;
int fibonacci(){
	int end;
	cout << "Ingrese un fin para la serie: ";
	cin >> end;
	int a = 1, b = 1, sum = 0;
	
	for(unsigned i = 0; i<end; i++){
		sum = a + b;
		a = b;
		b = sum;
		cout << sum << endl;
	}
	cin >> end;
}